S. Krishnakumar, A. Saravanan, K. Ramesh, S.K. Natarajan, V. Veerabadran and S. Mani
Asian Journal of Plant Sciences 4 ( 5 ): 510 - 512 , 2005
K. Ramesh, A. Nirmalkumar and G. Gurusamy
International Journal of Electrical and Power Engineering 3 ( 3 ): 163 - 168 , 2009